Lumley Reference Valve Amps

AbbieKitten

Novice Member
New to the Forum

Hi everyone

Anyone familiar with Lumley Reference Valve Monoblock amplifiers

I have a question about the bias screws

The instructions book we have says there is a bias adjustment screw behind each valve, however ours only has one central screw.

We are unsure as to how the bias adjustment works on our amps.

Thanks in advance.
 

musicphil

Active Member
It could be possible that it is an auto bias amp?
Normally there would be + & - screws/holes close to each tube.
 
Last edited:

Craig uk

Well-known Member
New to the Forum

Hi everyone

Anyone familiar with Lumley Reference Valve Monoblock amplifiers

I have a question about the bias screws

The instructions book we have says there is a bias adjustment screw behind each valve, however ours only has one central screw.

We are unsure as to how the bias adjustment works on our amps.

Thanks in advance.
Can we have a picture of the board, sometimes bias adjustment is made via a small pot next to each valve.
 

The latest video from AVForums

AVForums Movies Podcast: Streaming Theatrical Releases And The Future Of Cinema
Subscribe to our YouTube channel
Support AVForums with Patreon

Top Bottom